STARS OF THE UNIVERSE !!!!!!!!!
Stars form from hydrogen and helium. These gases rotate around each other forming a disc like shape, than the innermost layers becomes a spheric clump. These materials grow hotter and hotter forming a ball-shaped protostar. An intermediate mass star begins with a cloud that takes about 100,000 years to collapse into a protostar with a surface temperature of about 6,750 F. This star continues to collapse for roughly 10 million years until its expansion do to energy generated by nuclear fusion is balanced by its contraction from gravity,after which point becomes a main sequence star that gets all its energy from hydrogen fusion in its core.
The greater the mass of such a star, the more quickly it will use its hydrogen fuel and the shorter it stays on the main sequence. After all the hydrogen in the core is fused into helium , the star changes rapidly without nuclear radiation to resist it, gravity immediately crushes matter down into the stars core, quickly heating the star. This causes the star's outer layer's to expand.When a star reaches a mass of more than 1.4 solar masses, electron pressure cannot support the core against further collapse, according to NASA. The result is a supernova. In about one second, the core shrinks to about to about six miles wide and rebounds like a rubber ball that has been squeezed, sending a shock wave through the star that causes fusion to occur in the outlying layers. Afterward, the star EXPLODES in a Type 2 supernova.
If the remaining stellar core was less than roughly three solar masses large, it becomes a NEUTRON STAR made up nearly entirely of neutrons. If the stellar core was larger than about three solar masses, no known force can support it against its own gravitational pull, and it collapses to create a BLACK HOLE!
DID YOU KNOW?
-The Eagle Nebula is not only known as the M16, but also The Star Queen Nebula and The Spire!
-It is a star forming region!
-Discovered in 1764!
-Three total colors in this beautiful mosaic, Eagle Nebula!
-Astrinomically speaking, the Eagle Nebula is close to Earth, just MILLIONS of miles away. Compared to the 5 of the Galaxy it is close to us!
In 1995 ,the world was astounded by the beautiful Hubble Space Telescope images of the eagle nebula. Let us take a look at this intriguing region.
Also known as M16, the Eagle Nebula is a 5.5 million year old cloud of molecular hydrogen gas and dust stretching approximately 70 years by 55 lightyears.
The Eagle Nebula, a vast cloud of gas and dust where stars are being born, lies some 7,000 light years distant in the direction of the constellation Serpens. Hot, newborn stars illuminate the gas. These pillars are slowly "evaporating" under the glare of intense radiation from massive stars that were recently born nearby. Emerging from the eroding tips of the pillars are dense globules of gas and dust. Though tiny in the Hubble Space image, these globules are as wide as our entire solar system. New stars are forming from gas condensing within these stellar cocoons (WHOA just like a butterfly), a process that takes about one hundred million years. The following Internet links will provide additional information.